Google Images is a search service created by Google and introduced in July 2001, that allows users to search the Web for image content . The keywords for the image search are based on the filename of the image, the link text pointing to the image, and text adjacent to the image. When searching for an image, a thumbnail of each matching image is displayed. When the user clicks on a thumbnail, the image is displayed in a box over the website that it came from. The user can then close the box and browse the website, or view the full-sized image.

In early 2007 Google implemented an updated user interface for the image search, where information about the image, such as resolution and URL, was hidden until the user moved the mouse over the thumbnail. This was discontinued after a few weeks.

On July 20, 2010, Google updated the user interface again, hiding image details until mouse over, like before. This feature can be disabled by pressing "Ctrl + End" on one's keyboard and clicking "Switch to basic version".